/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePartyInterface.h
Party creation async task completed callback
typedef TBaseDelegate_ThreeParams< void, const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) &, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< const [FOnlinePartyId](API\Plugins\OnlineSubsystem\FOnlinePartyId) > &, const [ECreatePartyCompletionResult](API\Plugins\OnlineSubsystem\Interfaces\ECreatePartyCompletionResult) > FOnCreatePartyComplete